21433440322231 has 16 divisors (see below), whose sum is σ = 25078164274944. Its totient is φ = 17934865449984.

The previous prime is 21433440322223. The next prime is 21433440322243. The reversal of 21433440322231 is 13222304433412.

It is not a de Polignac number, because 21433440322231 - 2³ = 21433440322223 is a prime.

It is a super-2 number, since 2×21433440322231² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21433440322271) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18096010 + ... + 19244023.

It is an arithmetic number, because the mean of its divisors is an integer number (1567385267184).

Almost surely, 2^{21433440322231} is an apocalyptic number.

21433440322231 is a deficient number, since it is larger than the sum of its proper divisors (3644723952713).

21433440322231 is a wasteful number, since it uses less digits than its factorization.

21433440322231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37341990.

The product of its (nonzero) digits is 82944, while the sum is 34.

Adding to 21433440322231 its reverse (13222304433412), we get a palindrome (34655744755643).

The spelling of 21433440322231 in words is "twenty-one trillion, four hundred thirty-three billion, four hundred forty million, three hundred twenty-two thousand, two hundred thirty-one".